“Since I favor total self-control—absolute government of the individual over himself—I believe autarchy more accurately describes, in a positive fashion, the kind of situation I consider most desirable. Some dictionaries define autarchy as a kind of tyranny or despotism, but of necessity it is limited to self-application.”

"Science Past, Science Future" (1975) p. 208
General sources

Source: 1950s-1960s, The Presentation of Self in Everyday Life, 1959, p. 229

From his formal acceptance of the Republican party’s nomination for President (14 August 1924), as quoted in Coolidge: An American Enigma (1998), by Robert Sobel, Regnery Publishing, p. 292.
1920s

Speech at Oxford Union (2014)

The Greening of America turns 40 (2010)
Context: I see self-destruction now on a grand scale. That is, the unwillingness to pay for the things society needs. That's the most basic kind of self-destruction. That we're not prepared to pay for schools, we're not prepared to pay for highways. That is self-destruction. What are we doing to ourselves? It is nuts.

1850s, Speech at Peoria, Illinois (1854)
Context: "Fools rush in where angels fear to tread." At the hazard of being thought one of the fools of this quotation, I meet that argument — I rush in — I take that bull by the horns. I trust I understand and truly estimate the right of self-government. My faith in the proposition that each man should do precisely as he pleases with all which is exclusively his own lies at the foundation of the sense of justice there is in me. I extend the principle to communities of men as well as to individuals. I so extend it because it is politically wise, as well as naturally just: politically wise in saving us from broils about matters which do not concern us. Here, or at Washington, I would not trouble myself with the oyster laws of Virginia, or the cranberry laws of Indiana. The doctrine of self-government is right, — absolutely and eternally right, — but it has no just application as here attempted. Or perhaps I should rather say that whether it has such application depends upon whether a negro is not or is a man. If he is not a man, in that case he who is a man may as a matter of self-government do just what he pleases with him.
But if the negro is a man, is it not to that extent a total destruction of self-government to say that he too shall not govern himself. When the white man governs himself, that is self-government; but when he governs himself and also governs another man, that is more than self-government — that is despotism. If the negro is a man, why then my ancient faith teaches me that "all men are created equal," and that there can be no moral right in connection with one man's making a slave of another.

Source: Striking Thoughts (2000), p. 19

14th time lucky (2005)